Jardine was elected for the Edinburgh West constituency in the 2017 UK general election, succeeding independent MP Michelle Thomson who had been elected as a member of the SNP. Jardine received 18,108 votes and 34.4% of the overall vote.[10]

She is the Liberal Democrats Spokesperson on work and pensions[11] and sits on the Scottish Affairs Committee at Westminster.[12] She also speaks on Digital, Culture, Media and Sport in the House of Commons.